Gearing.



0. M. BERGSTROM.

GEARING.

APPLICATION FILED 8.1.1912.

Patented May 4, 1915.

3 SHEETSSHEET 2.

Witnassa f 665% %%m THE NORRIS PETERS Ca, PHOTCVLITHOY. WASHING TON. D C,

0. M. BERGSTROM.

GEARING.

APPLICATlON FILED FEB. I, 1912..

Patented May 4, 1915.

3 SHEETS-SHEET 3 an QQEEEE By 1115 Afiarm29 OSCAR M. B E-BGSTROM, OF MINNEAPOLIS, MINNESOTA.

GEARING.

Specification of Letters Patent.

Patented May 4, 1915.

Application filed. February 1, 1912. Serial No. 674,808.

To all whomit may concern:

Be it known that I, OSCAR M. BERcsTRoM, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Gearing; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide a simple and highly eflicient air pump adapted to remain permanently applied to an automobile, to be driven from the engine thereof, and to be thrown into and out of action, at will, while the machine is at a stand still, and while the transmission mechanism is disconnected from the traction wheels.

To the above ends, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

Any suitable type of air pump may be employed so far as my present invention is concerned, but for illustration, I have shown an air pump of the general type disclosed in my prior Patent No. 968,732, of .date, August 30th, 1910, entitled pumping attachment I for automobiles. The pump arrangement disclosed in my said prior patent required one of the traction wheels to be jacked up, 7

or lifted from the ground, and then driven, in order to operate the pump. and the pump was detachably applied to the hub of said traction wheel. My present arrangement enables, the pump to remain permanently applied to the machine and by a novel device, I provide an extremely simple and efficient means for throwing the pump into and out of action. at wilL-as required to inflate the tires of the machine. Also the arrangement is such that when the pump is thrown into action, it will be driven either from the engine crank shaft or from a part'that is driven from the engine crank shaft while the traction wheels of the machine are idle or disconnected from the transmission mechanism. In the illustration shown in the drawings, a gear for driving the pump is connected to that portion of the transmission.

shaft which is between the engine crank shaft proper and the differential gear mechanism and which is, therefore, driven whenever the engine is in action and without requiring the traction wheels to be driven.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a plan view showing the pump, a portion of the machine frame, a portion of the transmission shaft, and the improved connections for driving the pump from the transmission shaft, some parts being broken away, and some parts being sectioned; Fig. 2 is a section taken on the line B m on Fig. 1, some parts being broken away and showing also a portion of the floor of the vehicle body; Fig. 3 is a vertical section taken on the line 02 m on Fig. 2; Fig. 4 is a front elevation of the parts shown in Fig. 3, portions being broken away; Fig. 5 is a view in rear elevation illustrating a modified arrangement for throwing the pump into and out of action, some parts being broken away and some parts being indicated by dotted lines only; and Fig. 6 is a view of the parts shown in Fig. 5, partly in side elevation and partly in vertical section.

Of the parts of the machine or automobile, the numeral 1 indicates the running gear frame, the numeral 2 indicates a transmission shaft, and the numeral 3 the floor of the machine body.

The gear 4 for driving the air pump is, as shown, a diametrically split gear, the sections of which are clamped to a sleeve 5, which latter, as shown, is rigidly secured to and carried by the transmission shaft 2.

The pump shown comprises two axially alined opposing cylinders 7 secured to a central crank shaft casing 8. The crank shaft casing 8, on one side, is rigidly secured, as

through a suitable crank rod from a spur gear 13 that operates as a crank disk, and, as shown, has a hub projecting into the crank shaft casing 8, and journaled thereinby means of a suitableball bearing 14:. By oscillatorymovements of the so-called shipper lever 10, the gear 13 is adapted tobe.

moved into and out of mesh with the driving gear. 4-. on: thetransmission shaft 2. The novel device for throwing the said gears into and out of mesh, may take different forms, but is preferably constructed, as illustrated in Figs. 1 to 4 inclusive, wherein the numeral 15 indicates a clamping arm. provided with a shallow hub that works in a segmental slot 16 formed in the lower extremity of the lever 10. The hub of the arm 15 has threaded engagement with the threaded shank of a clamping bolt 17 that isrotatably mounted on the lower end of the bearing bracket 12, and at its frontqend is provided. with a flanged head 18; This flanged'head 18 is provided with-,circumferentially spaced perforations" 19. A set screw 20 is passed through one or the -otherof the perforations 1 9 andisscrewed into the lower end of the the clamping bolt 17, the clamping lever 15 may be so adjusted that when it is forced downward, as shown inFig. 2, it will clamp the free end of the shipper lever 10 against the bracket 12 with sufficient friction to hold the'd'riven gear 13. in mesh with the driving gear 4:. I

An operating rod 21 is pivotally connected'at its lower end to the free end of; the

clamping arm 15 and is passed upward through the perforated lug 22 formed on an upwardly extended arm of theyshi'pper its bite on the shipper arm 10, and thenby pulling laterally on the upper end of the. rod 21, the shipper lever'lOmay be oscillated:

on its pivoted bolt. 11, soas to throw the gear 13 out of. mesh with the gear .4. "When the clamping arm 15 isreleased, as above stated, the gear 13 may be moved intoimesh, with the gear 4 by pushing or pressing the raised upper end of the rod 21 toward the 1 I to either one of the two extremepositions right in respect to Fig. 2. Then the gear 13 is thrown outof-mesh. with the gear 4:, the

shipper lever 10 may be secured in its retracted position by pressing, the clamping holdingthe upper .end ofthe rod 21. down or pressed toward the left, in respect to Fig. 2. Hence, by the clamping arm 15., the shipper lever 10: may be frictionally secured provided with a suitable handthe rod21 is'pulled upward to raise out of'mesh therewith;

In practice, I have found that sometimes the operatorwill step on the head of the operating rod '21 and thereby set the clamping lever 15 so tightly that it is very difiicult to release the same by hand or by again pulling upward on the said rod. Toprevent this extreme setting of the clamping lever, I (see Fig. 1 provide the shipper lever 10 with a laterally projecting lug 25 that is adapted, to engage a stopscrew'26 screwed through a lug 27 on. the bearing bracket 12.

The clamping lever 15' is adapted to be given approximately aconstant extreme movement under manipulation through the operating rod 21', and hence, to vary the tension under which the said clamping leverwill, be frictionally set, I have made the clamping bolt 17 rotatably adjustable. Obviously, the further the threaded end ofthe bolt 17 is screwed, into the hub of theclamping lever 15,,the greater will be the clamping, action of said lever; when" forced to its extreme downward position shownin Fig. 2.

In the modified form of the device shown in Figs. 5 and 6, the crankshaft casing' 8 is provided. with an axially projecting threaded trunnion 28 that projects through a vertical slot 29 in a bifurcated supporting bracket 30, and is,engaged by thethreaded hub 31 of the hand operatedclamping lever 32. With this construction, when the;pump is lowered, as shown, the gear 13 .will be thrown into mesh with the. gear 4, and the said pump may be secured in such position gear 13 either into or; out of mesh with the gear 4:. By tightening the said clamping lever on the said bracketwhen'thepump is raised, the; gear 13 may be secured out of mesh with the gear 4.

I What I claim is:

1. The combination. with a driving gear, of a movable; gear support, a drivengear" on said support, said support being, movably mounted" and arranged to throw said-two gearsinto and out ofmesh, a clamp operative to secure saidlsupport in-on'e, position or another, and" a common operating'rod' or element connected to said, support and to said clamp and movable. in one direction to move the former; and in another direction I v to operate the latter; arm 15 downward, while at the same time 2. The combination with ad'riving gear and a movable gear support, of a shipper lever pivoted to said support and having a segmental slot, a driven gear carried by said" in said shipper lever, a clamping arm havto oscillate said shipper lever and thereby 10 ing threaded engagement with said bolt and throw said driven gear into or out of mesh cooperating therewith to clamp said shipper with said driving gear.

lever in respect to said support, and an op- In testimony whereof I afiEix my signature erating rod pivotally connected to said' in presence of two witnesses.

clamping lever and passed through a guide OSCAR M. BERGSTROM. on said shipper lever, the said rod, when Witnesses:

moved endwise, serving to set or release said EDITH SIMERMAN,

clamping arms, and when moved laterally, HARRY D. KILGORE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

